US8317643B2 - Hydraulic tensioning system comprising integrated overpressure valve - Google Patents
Hydraulic tensioning system comprising integrated overpressure valve Download PDFInfo
- Publication number
- US8317643B2 US8317643B2 US12/669,677 US66967708A US8317643B2 US 8317643 B2 US8317643 B2 US 8317643B2 US 66967708 A US66967708 A US 66967708A US 8317643 B2 US8317643 B2 US 8317643B2
- Authority
- US
- United States
- Prior art keywords
- valve
- piston
- tensioning system
- housing
- floor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0806—Compression coil springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
- F16H2007/0814—Fluid pressure with valves opening on surplus pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
- F16H2007/0859—Check valves
Definitions
- the present invention relates to a hydraulic tensioning system that is used in traction mechanism drives, in particular, chain drives of internal combustion engines.
- the tensioning system comprises a crucible-shaped piston that is guided in a linearly displaceable manner in a housing provided as the cylinder and that is spring-loaded directly or indirectly against a traction mechanism.
- the hydraulic fluid of the tensioning system is discharged from the pressure chamber via a damping device or flows into the pressure chamber via a one-way valve.
- Hydraulic tensioning systems in the construction described previously are preferably used in chain drives of internal combustion engines, wherein, for pressurizing the tensioning system with hydraulic fluid, the housing is connected via an opening to the pressure circulating lubrication system of the internal combustion engine.
- the damping device of hydraulic tensioning systems must be adapted exactly to the conditions of use, because the flow cross section or the flow rate of the hydraulic fluid via the damping device directly influences the damping of the piston.
- a hydraulic tensioning system is known.
- the hollow-cylindrical piston closed on one side by a piston floor has, in its hollow space, a ring-shaped disk that contacts the piston floor with a planar end face.
- the ring-shaped disk is provided with a passage borehole that communicates with throttling channels.
- the pressure chamber extends into the interior of the hollow-shaped piston.
- the pressurized hydraulic fluid flows through the passage borehole of the ring-shaped disk and the throttling channels via an opening in the piston floor, for example, into a collection chamber allocated to the tensioning system.
- the invention is based on the objective of providing an installation-space-optimized, economical hydraulic tensioning system.
- an overpressure valve that acts as a damper positioned within the piston and is constructed as a spring-loaded valve plate.
- the design of the overpressure valve according to the invention is realized so that its crucible-shaped valve housing is surrounded by a compression spring allocated to the piston.
- the overpressure valve constructed according to the invention as a valve plate realizes an installation-space-optimized solution to meet the objective.
- the concept according to the invention takes further advantage of the necessary installation space in the axial direction, by which the entire hydraulic tensioning system advantageously has a smaller longitudinal extent.
- the configuration of the overpressure valve according to the invention advantageously comprises a valve housing that has an opening in a floor directed toward the compression spring of the piston, wherein this opening forms a valve seat on the inside of the valve housing.
- a spring-loaded valve plate forms a sealing contact on the valve seat.
- valve housing preferably has a partial or circular rim directed radially outward.
- one spring end of the compression spring integrated within the piston is supported by the rim of the valve housing with a non-positive fit on the piston floor.
- the rim of the valve housing is supported with a pressure-tight and liquid-tight contact on the piston floor. This goal can be achieved through corresponding production tolerances, by which a high-quality seal can be achieved in the contact zone between the rim and the piston floor without expanding sealing means.
- suitable sealing means it is possible to use suitable sealing means.
- valve housing by an interference fit in the piston interior space.
- local regions of the rim so that these are positioned with a certain biasing on the inner wall of the piston in the installed state of the overpressure valve.
- the valve plate of the overpressure valve constructed as a valve plate it is preferably provided to arrange at least a partial bead directed radially inward in the valve housing.
- the bead is here offset so far from the valve seat of the overpressure valve that a sufficient opening cross section is set that guarantees a largely unhindered flow of the hydraulic fluid.
- the bead further creates a captive arrangement of the valve plate, which has an advantageous effect on the mounting.
- the bead of the valve housing can also be used for supporting a plate spring that is provided for spring-loading the valve plate on the valve seat. This configuration allows the disclosure of an overpressure valve containing all of the components, by which simplification of the mounting is simultaneously realized.
- the plate spring can be used as an alternative to a helical compression spring supported between the piston floor and the valve plate.
- Another preferred construction of the invention allows the arrangement of the valve seat for the valve plate in a conically inward directed section of the floor of the valve housing. This construction advantageously creates a defined linear contact between the valve plate and the zone forming the valve seat in the floor of the valve housing. Thus, advantageously an improved sealing effect of the overpressure valve could be established.
- valve housing For producing the valve housing, a non-cutting deep-drawing method is preferred. In this way, a valve housing could also be produced economically in large quantities from sheet metal through forming.
- the hydraulic tensioning system in which the overpressure valve is integrated advantageously includes another plate valve by which the hydraulic fluid flows into the pressure chamber. Comparable to the overpressure valve, this valve also comprises a spring-loaded valve plate that interacts with a flow opening in the housing.
- FIGURE is a longitudinal section view of a hydraulic tensioning system.
- the sole FIGURE shows a hydraulic tensioning system 1 according to the invention in a longitudinal section.
- the configuration comprises a crucible-shaped housing 2 that is provided for accommodating a piston 3 whose opened side is allocated to a floor 4 of the housing 2 .
- the housing 2 and also the piston 3 define a pressure chamber 5 that is filled, in the operating state, with a hydraulic fluid.
- the hydraulic fluid flows via an inlet opening 6 formed in the floor 4 of the housing 2 and also a downstream one-way valve 7 into the pressure chamber 5 .
- a compression spring 8 supporting the actuating movement of the piston 5 is supported with a first spring end directly on the one-way valve 7 that is constructed as a plate valve and that is arranged in a stepped section of the floor 4 .
- the additional spring end of the compression spring 8 extends across the entire length of the piston 3 and is guided on an inner wall of the piston 3 and connects to a piston floor 10 .
- the crucible-shaped piston 3 is allocated to a not-shown traction mechanism by the piston floor 10 directly or indirectly, in particular, by a tensioning rail.
- the overpressure valve 11 comprises a valve housing 12 that is open on one side and that is produced without cutting, in particular, through a deep-drawing method.
- the valve housing 12 surrounded on the outside by the compression spring 8 is supported with a partial or circular rim 13 directed radially outward by a contact face 23 on the piston floor 10 .
- a stable installed position of the valve housing 12 is set by the compression spring 8 in which one spring end is supported directly on the rim 13 .
- the compression spring 8 in which one spring end is supported directly on the rim 13 .
- a compression spring 14 is integrated that is used between the piston floor 10 and a valve plate 15 of the overpressure valve 11 .
- the valve plate 15 is in active connection with a valve seat 16 on the floor 17 of the valve housing 12 .
- the floor 17 has a conical construction in the direction of the compression spring 14 , by which a nearly linear contact of the valve plate 15 is set on the valve seat 16 , which improves the sealing quality.
- a circular or partial bead 19 directed radially inward is introduced into the valve housing 12 , wherein this bead forms, on one hand, a stroke limit and, on the other hand, a captive arrangement for the valve plate 15 .
- the diameter of the valve plate 15 exceeds an inner diameter of the valve housing 12 in the region of the bead 19 .
- a partial quantity of the hydraulic fluid from the pressure chamber 5 can be shut off by the overpressure valve 11 that acts as a damper and also a borehole 20 introduced centrally in the piston floor 10 .
Abstract
Description
- 1 Tensioning system
- 2 Housing
- 3 Piston
- 4 Floor
- 5 Pressure chamber
- 6 Inlet opening
- 7 One-way valve
- 8 Compression spring
- 9 Inner wall
- 10 Piston floor
- 11 Overpressure valve
- 12 Valve housing
- 13 Rim
- 14 Compression spring
- 15 Valve plate
- 16 Valve seat
- 17 Floor
- 18 Opening
- 19 Bead
- 20 Borehole
- 23 Contact face
Claims (9)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007033600A DE102007033600A1 (en) | 2007-07-17 | 2007-07-17 | Hydraulic clamping system with integrated overpressure valve |
DE102007033600 | 2007-07-17 | ||
DE102007033600.6 | 2007-07-17 | ||
PCT/EP2008/057497 WO2009010352A1 (en) | 2007-07-17 | 2008-06-13 | Hydraulic tensioning system comprising integrated overpressure valve |
Publications (2)
Publication Number | Publication Date |
---|---|
US20110015013A1 US20110015013A1 (en) | 2011-01-20 |
US8317643B2 true US8317643B2 (en) | 2012-11-27 |
Family
ID=39735266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/669,677 Expired - Fee Related US8317643B2 (en) | 2007-07-17 | 2008-06-13 | Hydraulic tensioning system comprising integrated overpressure valve |
Country Status (3)
Country | Link |
---|---|
US (1) | US8317643B2 (en) |
DE (1) | DE102007033600A1 (en) |
WO (1) | WO2009010352A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180274636A1 (en) * | 2017-03-21 | 2018-09-27 | Tsubakimoto Chain Co. | Tensioner |
US10253852B2 (en) * | 2013-12-16 | 2019-04-09 | Schaeffler Technologies AG & Co. KG | Hydraulic tensioning device for a traction mechanism drive |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007057783A1 (en) * | 2007-11-30 | 2009-06-04 | Schaeffler Kg | traction means tightening device |
CN103765044B (en) * | 2011-09-22 | 2017-02-08 | 博格华纳公司 | Chain drive tensioner spring force control mechanism |
US9377088B2 (en) | 2011-09-22 | 2016-06-28 | Borgwarner Inc. | Chain drive tensioner spring force control mechanism |
WO2014099291A1 (en) | 2012-12-18 | 2014-06-26 | Borgwarner Inc. | Tensioner with spring force control in a second bore |
KR102211909B1 (en) * | 2013-03-05 | 2021-02-08 | 보르그워너 인코퍼레이티드 | Chain drive tensioner spring force control mechanism |
JP6360843B2 (en) * | 2013-03-07 | 2018-07-18 | ボーグワーナー インコーポレーテッド | Tensioner with spring force control mechanism |
DE102013224457A1 (en) | 2013-11-28 | 2015-05-28 | Schaeffler Technologies AG & Co. KG | Regulated hydraulic tensioning device |
US20180119832A1 (en) * | 2015-05-14 | 2018-05-03 | Borgwarner Inc. | Integrated disk check valve in a hydraulic tensioner with metered backflow |
JP6374840B2 (en) | 2015-08-03 | 2018-08-15 | 株式会社椿本チエイン | Tensioner |
DE102016207779B4 (en) * | 2016-05-04 | 2022-01-05 | Schaeffler Technologies AG & Co. KG | Tensioning device for a chain drive |
CN109139831A (en) * | 2017-06-15 | 2019-01-04 | 博格华纳公司 | Stretcher with rigidity controllable check valve |
CN109654183A (en) * | 2017-10-12 | 2019-04-19 | 博格华纳公司 | Hydraulic tensioner with adjustable check-valves |
KR20200105922A (en) | 2018-01-31 | 2020-09-09 | 보르그워너 인코퍼레이티드 | Variable force tensioner arm with cap disc spring |
KR20200115642A (en) | 2018-02-26 | 2020-10-07 | 보르그워너 인코퍼레이티드 | Variable force tensioner with internal reservoir technology primary bore |
JP2020101279A (en) * | 2018-12-21 | 2020-07-02 | ボーグワーナー インコーポレーテッド | Tensioner with piston containing internal check valve |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4940447A (en) | 1989-04-17 | 1990-07-10 | Ntn Toyo Bearing Co., Ltd. | Autotensioner for adjusting the tension of a timing belt |
US5033507A (en) * | 1990-06-19 | 1991-07-23 | Mine Safety Appliances Company | Filter cover assembly for a respirator |
DE4015708C1 (en) | 1990-05-16 | 1991-07-25 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Hydraulic IC engine chain tensioner - has liq. outlet limiting closure of sintered metal with incorporated throttling passages |
US5586952A (en) | 1994-07-26 | 1996-12-24 | Ntn Corporation | Hydraulic autotensioner |
DE19632383A1 (en) | 1995-08-18 | 1997-02-20 | Borg Warner Automotive | Combined hydraulic inlet and pressure relief valve |
US5755252A (en) * | 1994-08-24 | 1998-05-26 | G.T. Products, Inc. | Control valve with two-stage shutoff and peel away opening action |
US5819794A (en) * | 1996-10-03 | 1998-10-13 | Borg-Warner Automotive, Inc. | Hydraulic tensioner with a contoured disc check valve |
US6193623B1 (en) * | 1996-08-02 | 2001-02-27 | INA Wälzlager Schaeffler oHG | Tensioner with improved damping device |
EP1101975A2 (en) | 1999-11-17 | 2001-05-23 | BorgWarner Inc. | Pressure relief valve and dual path vent disc for hydraulic tensioner. |
US6361458B1 (en) * | 1998-04-20 | 2002-03-26 | Borgwarner Inc. | Hydraulic tensioner with pressure relief valve |
US6435993B1 (en) * | 1999-07-05 | 2002-08-20 | Borgwarner Inc. | Hydraulic chain tensioner with vent device and pressure relief valve |
US6592479B2 (en) * | 2000-10-26 | 2003-07-15 | Tsubakimoto Chain Co. | Tensioner with relief valve mechanism |
US6810907B2 (en) * | 2001-10-12 | 2004-11-02 | Tsubakimoto Chain Co. | Hydraulic tensioner with relief valve mechanism |
WO2005108823A1 (en) | 2004-04-16 | 2005-11-17 | Joh. Winklhofer & Söhne GmbH und Co. KG | Tensioning device comprising a plate-type check valve |
-
2007
- 2007-07-17 DE DE102007033600A patent/DE102007033600A1/en not_active Withdrawn
-
2008
- 2008-06-13 WO PCT/EP2008/057497 patent/WO2009010352A1/en active Application Filing
- 2008-06-13 US US12/669,677 patent/US8317643B2/en not_active Expired - Fee Related
Patent Citations (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4940447A (en) | 1989-04-17 | 1990-07-10 | Ntn Toyo Bearing Co., Ltd. | Autotensioner for adjusting the tension of a timing belt |
DE4015708C1 (en) | 1990-05-16 | 1991-07-25 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Hydraulic IC engine chain tensioner - has liq. outlet limiting closure of sintered metal with incorporated throttling passages |
US5033507A (en) * | 1990-06-19 | 1991-07-23 | Mine Safety Appliances Company | Filter cover assembly for a respirator |
US5586952A (en) | 1994-07-26 | 1996-12-24 | Ntn Corporation | Hydraulic autotensioner |
US5755252A (en) * | 1994-08-24 | 1998-05-26 | G.T. Products, Inc. | Control valve with two-stage shutoff and peel away opening action |
DE19632383A1 (en) | 1995-08-18 | 1997-02-20 | Borg Warner Automotive | Combined hydraulic inlet and pressure relief valve |
US5700213A (en) * | 1995-08-18 | 1997-12-23 | Borg-Warner Automotive, Inc. | Integral inlet and pressure relief valve for an automotive tensioner |
US6193623B1 (en) * | 1996-08-02 | 2001-02-27 | INA Wälzlager Schaeffler oHG | Tensioner with improved damping device |
US5819794A (en) * | 1996-10-03 | 1998-10-13 | Borg-Warner Automotive, Inc. | Hydraulic tensioner with a contoured disc check valve |
US6361458B1 (en) * | 1998-04-20 | 2002-03-26 | Borgwarner Inc. | Hydraulic tensioner with pressure relief valve |
US6435993B1 (en) * | 1999-07-05 | 2002-08-20 | Borgwarner Inc. | Hydraulic chain tensioner with vent device and pressure relief valve |
DE60027227T2 (en) | 1999-07-05 | 2006-08-31 | Borgwarner Morse Tec Japan K.K., Nabari | Hydraulic chain tensioner with venting device and pressure relief valve |
EP1101975A2 (en) | 1999-11-17 | 2001-05-23 | BorgWarner Inc. | Pressure relief valve and dual path vent disc for hydraulic tensioner. |
US6322468B1 (en) * | 1999-11-17 | 2001-11-27 | Borgwarner Inc. | Pressure relief valve and dual path vent disc for hydraulic tensioner |
US6592479B2 (en) * | 2000-10-26 | 2003-07-15 | Tsubakimoto Chain Co. | Tensioner with relief valve mechanism |
US6810907B2 (en) * | 2001-10-12 | 2004-11-02 | Tsubakimoto Chain Co. | Hydraulic tensioner with relief valve mechanism |
WO2005108823A1 (en) | 2004-04-16 | 2005-11-17 | Joh. Winklhofer & Söhne GmbH und Co. KG | Tensioning device comprising a plate-type check valve |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10253852B2 (en) * | 2013-12-16 | 2019-04-09 | Schaeffler Technologies AG & Co. KG | Hydraulic tensioning device for a traction mechanism drive |
US20180274636A1 (en) * | 2017-03-21 | 2018-09-27 | Tsubakimoto Chain Co. | Tensioner |
US10753433B2 (en) * | 2017-03-21 | 2020-08-25 | Tsubakimoto Chain Co. | Tensioner |
Also Published As
Publication number | Publication date |
---|---|
WO2009010352A1 (en) | 2009-01-22 |
US20110015013A1 (en) | 2011-01-20 |
DE102007033600A1 (en) | 2009-01-22 |
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